//--------------------------------------------------------------------------
//	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//	Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//	Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//	Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//	Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package com.ishitong.freesql.ognl;


/**
 * @author Luke Blanshard (blanshlu@netscape.net)
 * @author Drew Davidson (drew@ognl.org)
 */
class ASTProperty extends SimpleNode {
	private boolean indexedAccess = false;

	public ASTProperty(int id) {
		super(id);
	}

	public ASTProperty(OgnlParser p, int id) {
		super(p, id);
	}

	public void setIndexedAccess(boolean value) {
		indexedAccess = value;
	}

	/**
	 * Returns true iff this property is itself an index reference.
	 */
	public boolean isIndexedAccess() {
		return indexedAccess;
	}

	/**
	 * Returns true if this property is described by an
	 * IndexedPropertyDescriptor and that if followed by an index specifier it
	 * will call the index get/set methods rather than go through property
	 * accessors.
	 */
	public int getIndexedPropertyType(OgnlContext context, Object source) throws OgnlException {
		if (!isIndexedAccess()) {
			Object property = getProperty(context, source);

			if (property instanceof String) {
				return OgnlRuntime.getIndexedPropertyType(context, (source == null) ? null : source.getClass(), (String) property);
			}
		}
		return OgnlRuntime.INDEXED_PROPERTY_NONE;
	}

	public Object getProperty(OgnlContext context, Object source) throws OgnlException {
		return children[0].getValue(context, context.getRoot());
	}

	protected Object getValueBody(OgnlContext context, Object source) throws OgnlException {
		Object result, property = getProperty(context, source);
		Node indexSibling;

		result = OgnlRuntime.getProperty(context, source, property);
		if (result == null) {
			result = OgnlRuntime.getNullHandler(OgnlRuntime.getTargetClass(source)).nullPropertyValue(context, source, property);
		}
		return result;
	}

	protected void setValueBody(OgnlContext context, Object target, Object value) throws OgnlException {
		OgnlRuntime.setProperty(context, target, getProperty(context, target), value);
	}

	public boolean isNodeSimpleProperty(OgnlContext context) throws OgnlException {
		return (children != null) && (children.length == 1) && ((SimpleNode) children[0]).isConstant(context);
	}

	public String toString() {
		String result;

		if (isIndexedAccess()) {
			result = "[" + children[0] + "]";
		} else {
			result = ((ASTConst) children[0]).getValue().toString();
		}
		return result;
	}
}
